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US 2026/0229506 A1Published application
Lithium metal composite oxide, positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery
AssigneeSumitomo Metal Mining Co., Ltd.
InventorDaisuke NAGAO
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Abstract
A lithium metal composite oxide contains at least Li and Ni, in which (1) and (2) are satisfied, (1) in a pore size distribution of an adsorption isotherm which is obtained by measuring an adsorption isotherm and a desorption isotherm with a nitrogen gas according to a Barrett-Joyner-Halenda method, a pore volume in a range where a pore size is 2 nm to 10 nm is more than 0.4×10−3 cm3/g and 1.0×10−3 cm3/g, (2) A/D50 is 0.9×10−3 to 3.4× 10−3.
Claims13
A lithium metal composite oxide comprising:
- at least Li and Ni,
- wherein the following (1) and the following (2) are satisfied,
- (1) in a pore size distribution of an adsorption isotherm which is obtained by measuring an adsorption isotherm and a desorption isotherm with a nitrogen gas according to a Barrett-Joyner-Halenda method, a pore volume in a range where a pore size is 2 nm or more and 10 nm or less is more than 0.4× 10−3 cm3/g and 1.0×10−3 cm3/g or less,
- (2) A/D50 is 0.9×10−3 or more and 3.4×10−3 or less,
- (A is an average pore size (nm) based on a pore size distribution of a desorption isotherm obtained by measuring an adsorption isotherm and a desorption isotherm with a nitrogen gas according to a Barrett-Joyner-Halenda method, and D50 is a value (μm) of a particle diameter at 50% cumulative from a fine particle side in a cumulative particle size distribution curve obtained by a particle size distribution measurement of the lithium metal composite oxide).
2 more elements
Dependencies are inferred from the claim text.